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Zhongbu Qingtian's self-developed high-speed BC string welding machine ignites SNEC Shanghai Photovoltaic Exhibition

Issuing time:2024-06-13 17:37


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The 2024 SNEC Shanghai Photovoltaic Exhibition was grandly held on June 13th at the National Convention and Exhibition Center (Shanghai), with an unprecedented scale and the largest ever. As a platform based technology, BC technology became the "hot topic" of this exhibition.


QQ截圖20240613174144
QQ截圖20240613174144



Professor Martin Green, known as the "Father of Solar Energy in the World," once

said in an interview, "The next five years will be an important period of

technological competition, with intense competition between TOPCon and HIT.

However, in the long run, BC may become the winner


This is not only a recognition of BC battery technology, but also an expectation

for the future.


BC cell is a general term for various types of back contact structured crystalline

silicon solar cells, mainly including IBC, HBC, TBC, HPBC, ABC and other cells.




1


Front no gate line design, stimulating excellent efficiency

The front of the BC battery abandons metal gate lines and cleverly integrates the emitter, back field, and corresponding positive and negative electrodes on the back of the battery, forming a unique forked structure. This innovative design completely eliminates grid line obstruction, maximizes the utilization of incident light, and significantly improves battery efficiency and power generation.



2


Full back welding structure, comprehensive power generation efficiency UP!

BC technology adopts a full back "one" - shaped structure welding, which is different from the traditional "Z" - shaped welding strip connection method of non BC batteries. The front side has a higher light acceptance rate, which can effectively improve the power generation efficiency of components and maximize product conversion rate. The high-speed BC series welding machine CTM-60BC developed by Zhongbu Qingtian New Energy adopts technologies such as back facing fixture pressure welding tape and infrared lamp low-temperature welding, which perfectly matches the welding of front ungraded battery cells; The intelligent module splicing ensures the automation level of the device, with a production capacity of 6000 pieces/hour, which can match the production standards of first-line large factories, making BC batteries officially enter the era of mass production!


3


Aesthetics and practicality coexist harmoniously with architecture


Thanks to the unique design of the front without grid lines, BC batteries present a minimalist beauty in appearance, perfectly integrating into modern architectural style. At the same time, its component packaging technology effectively reduces battery gaps, improves battery density and power generation per unit component area, and demonstrates excellent commercial application prospects.


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Leading both in technology and compatibility

Accumulate steadily, with a promising future ahead


BC technology is a platform based technology that can be combined with PERC,

TOPCon, HJT and other processes to break through the efficiency bottleneck of a

single technology route and achieve efficiency breakthroughs.


BC batteries have excellent technical compatibility and are deterministic platform

technologies that can be compatible with TOPCon process to form TBC technology,

and can also be integrated with HJT technology to form HBC technology,

continuously improving battery efficiency.


Meanwhile, in order to achieve breakthroughs in conversion efficiency,

technologies such as TOPCon and HJT must also be combined with the BC

technology platform.


TOPCon+BC?TBC


HJT+BC?HBC



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It is expected that by 2025, the market share of BC batteries will account for 10% -15%, with an average annual expansion scale of about 40GW. In the future, BC technology is expected to occupy 30% -40% of the market share, coexisting with TOPCon, HJT, PERC and other technologies to build a diversified battery market pattern.



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In the past, BC batteries were limited by many pain points such as long production processes and some difficult processes, and have always been a "luxury" in the photovoltaic field, with a relatively small market share. However, the improvement of power generation efficiency has always been the first principle of the development of the photovoltaic industry. With the addition of industry giants such as Longi and Aixu, it confirms that BC technology has much greater potential for continuous efficiency improvement in the future than other technological routes, and will inevitably become the mainstream of the industry in the future.


Based on the market demand for BC batteries, Zhongbu Qingtian New Energy has independently developed a series of advanced equipment such as high-speed BC string welding machine CTM-60BC and fully automatic double track string welding machine CTM-25BC, which greatly improves the production efficiency and reliability of BC batteries. This means that products with high difficulty technology and high cost in the past are beginning to move towards the era of affordable prices, promoting the mass production process of BC batteries.


BC battery injects unlimited power into the future


One side is art, the other side is technology




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